A set of dry nitrogen cylinders, a gas distribution manifold for dry nitrogen/dry air (there's a compresser/dehydrator just out of the frame) and a set of three pressure switches, one of which is no longer connected.

This whole mess keeps large coaxial RF transmision line filled with dry gas, to prevent it collecting condensation, corroding and burning up. One of the lines tripped a pressure alarm yesterday morning and I had to go see what was the matter. Turned out to be a combination of minor, unfortunate events, none of them critical in and of themselves.

"I saw to what extent the people among whom I lived could be trusted as good neighbors and friends; that their friendship was for summer weather only; that they did not greatly propose to do right; that they were a distinct race from me by their prejudices and superstitions."